Escaped from an ornithologists' crate that fell to the tarmac at JFK, refugees from pet owners, released by a guerilla naturalist in Greenwood Cemetery: Whatever their origins, monk parrots have settled in Brooklyn, favoring utility pole transformers for building their Smart Car-sized, hive-shaped colonial nests, which are unexpectedly tolerated by Con Edison, the city's electricity company. Locals hold the birds in fond esteem, perhaps because they're loud, colorful and scratch out precarious livings on the fringes of institutional power; they are, in short, the perfect symbol for this borough of immigrants.